Gas for cutting and welding purposes



PITTSBURGH,

GAS FOR 1,329,400. 1T0 Drawing. Application filed August 3,

, STATES PATENT our-ion.

JOHN HARRIS, OI! LAKEWOOD, OHIO,

To all whom it may concern Be it known that I, J 01m HARRIS, a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State of Ohio, have invented acertain new an useful Improvement gases such as are employed with blow pipes or torches for cutting and welding metals.

' particularly e the same with gases.

It is the general ob ect of this invention to produce a gas which, while extremely economical of production, is capable of realizing the cuttin and welding operations in acient manner.

' It has been proposed to employ hydrogen for'the purpose of pro-heating metal in cutting with oxygen, also for pro-heating metal in connection with the operat'on of welding The objection to the use of hydrogen is that the flame produced by the combustion thereof is colorless, making it extremely difficult to bring the flame in proper relation to the metal.

It is the object of my invention a gas which will secure all of the advantages which maybe derived from the use of hydrogen, but will be free from the objection above noted which has heretofore attended this use. p i

In the production of such a gas, I add to hydrogen from 5% to 20% by volume of carbon monoxid. I As carbon monoxid has a flame temperature above that of hydrogen, the flame temperature produced by the combustion of the mixture of the same with hydrog'en is higher than flame; furthermore by the addition of carbon monoxid to the hydrogen, fined visible cone will be produced, which will extend from the blow pipe tip and enable the operator to apply to the metalthe particular part of the'flame (the tip of the cone) where the highest temperature exists; and this cone of intense temperature will extend a sufficient distance from the blow pipe tip to enable the operator conveniently to apply and position the flame with reference to the wor Because of the cheapness of its production, hydrogen is the most economical with which I .111 familiarv the combustion Specification of Letters .Batent.

its use.

to producethat of the hydrogena clearly 'de- ASSIGNOR OF ONE-HALF TO J. R. ROSE, OF

PENNSYLVANIA.

CUTTING AND WELDING PURPOSES;

Patented Feb. 3, 1920.

1918. Serial No. 248,112.

whereof will produce the temperatures requisite for cutting and welding purposes. However, because of the objection noted hereinbefore, it has been found impracticable hitherto to employ it for such purposes. By mixing carbon monoxid with hydrogen in about the proportions specified, the cost of the resultant mixture is not materially greater than that of hydrogen; and, by the use. of such mixture, I am enabled to obviate the objection that has hitherto rendered the use of hydrogen impracticable for the cutting and welding of metals and thus to open up a large and important field for In plants wherein oxygen is produced by the electrolytic process, hydrogen has heretofore been allowed to go to waste. I

By adding the proportion of carbon monoxid herein specified, I am enabled to make use of this waste product. I am also able to produce a fiameithe temperature whereof is higher than that of a flame produced from the combustion of hydrogen alone, and this temperature is the highest attainable with any of the gases except acetylene. I am also able to produce a gas suitable for cutting and welding purposes which require for its combustion a' minimum consumption of the expensive combustionsupporter oxygen. Furthermore, the flame produced by the combustion of the mixture accomplishes a very quick preheating of the metal, and; the tendency of the flame to within the tips is reduced to a minimum. I

It has been found that even small proportions of inert gases, such as carbon dioxid and nitrogen, are detrimental to the efli ciency ofoutting and weldina gases, even when present to the extent of only 1% to 2% by volume. ture of hydrogen and carbon monoxid only, with no inert gases.

Having thus described my invention, what I claimiszi A gas for cutting and welding purposes comprising a mixture of hydrogen and carbon monoxid only, the carbon monoxid constituting not materially less than 5% nor materially greater than 20%, by volume, of

the hydrogen.

JOHN HARRIS, I

My gasconsists of a m1x-' 

